How To Move Wordpress To a Subdirectory

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1. Change .htaccess in the subdirectory, i.e. example, where Wordpress now sits

# BEGIN WordPress

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /example
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /example/index.php [L]
</IfModule>

# END WordPress

2. Edit wp-config.php and add the following lines

define('WP_HOME','https://domain.com/example');
define('WP_SITEURL','https://domain.com/example');